diff --git a/control-plane/src/modules/calls/router.ts b/control-plane/src/modules/calls/router.ts
index 1cbb3787..d59ac8e5 100644
--- a/control-plane/src/modules/calls/router.ts
+++ b/control-plane/src/modules/calls/router.ts
@@ -3,11 +3,11 @@ import { initServer } from "@ts-rest/fastify";
 import * as jobs from "../jobs/jobs";
 import { packer } from "../packer";
 import { upsertMachine } from "../machines";
-import { BadRequestError } from "../../utilities/errors";
+import { BadRequestError, NotFoundError } from "../../utilities/errors";
 import { createBlob } from "../blobs";
 import { logger } from "../observability/logger";
 import { recordServicePoll } from "../service-definitions";
-import { resumeRun } from "../workflows/workflows";
+import { getJob } from "../jobs/jobs";
 
 export const callsRouter = initServer().router(
   {
@@ -75,7 +75,8 @@ export const callsRouter = initServer().router(
     },
     createCallResult: async (request) => {
       const { clusterId, callId } = request.params;
-      const { result, resultType, meta } = request.body;
+      let { result, resultType } = request.body;
+      const { meta } = request.body;
 
       const machine = request.request.getAuth().isMachine();
       machine.canAccess({ cluster: { clusterId } });
@@ -112,6 +113,44 @@ export const callsRouter = initServer().router(
         }
       }
 
+      if (!!result) {
+        // Max result size 500kb
+        const data = Buffer.from(JSON.stringify(result));
+        if (Buffer.byteLength(data) > 500 * 1024) {
+          logger.info("Call result too large, persisting as blob", {
+            callId,
+          })
+
+          const call = await getJob({ clusterId, jobId: callId });
+
+          if (!call) {
+            throw new NotFoundError("Call not found");
+          }
+
+
+          await createBlob({
+            data: data.toString("base64"),
+            size: Buffer.byteLength(data),
+            encoding: "base64",
+            type: "application/json",
+            name: "Oversize call result",
+            clusterId,
+            runId: call.runId ?? undefined,
+            jobId: callId ?? undefined,
+          });
+
+          result = {
+            message: "The result was too large and was returned to the user directly",
+          };
+
+          resultType = "rejection";
+        }
+      } else {
+        logger.warn("Call result is empty", {
+          callId,
+        })
+      }
+
       await Promise.all([
         upsertMachine({
           clusterId,